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Reykjav{\'{i}}k University's School of Computer Science has, despite its young 
age, gathered a diverse group of people working on a diverse set of projects. One
of these projects is about finding new ways to browse photo collections (\cite{prada}). 
In this work the authors propose displaying photo collections in three dimensional 
space, using the locations of each picture to convey information about it. An example 
of this might be to place images in different locations on the x, y and z axes 
depending on the amount of red, green and blue present in the picture. Another, and 
perhaps a more useful example would be to display pictures of cars, where brands are
represented on the x axis and the horsepower rating on the y axis. In this case
we might not use the z axis at all or we might choose to use it to represent the 
model of the car. Yet another example is to use all three dimensions to represent
the physical location where the picture was taken since technology is becoming
increasingly common for tagging images with a GPS location.

In their report, they point out a shortcoming of current 3D photobrowsers which is
the lack of ability to pivot dimensions. This operation would enable the user to
dynamically change the representation of the image collection being viewed. One
might for instance choose to exchange the horsepower rating dimension being 
represented on the y axis in the previous example for fuel efficiency rating and 
observe how this affects the arrangement of pictures on the screen.

Work has started on implementing a system that facilitates this sort of browsing.
This work has thus far mostly been focused on the operational semantics of the
browsing system rather than the visual representation. The purpose of the pr3Da 
project is to provide an API through which such visual representation can be
achieved.

